A flooring underlayment includes a base membrane and a cover membrane. The base membrane is configured to be installed between a subfloor and floor tiles to allow movement of the floor tiles relative to the subfloor. The cover membrane is configured to be coupled to the base membrane to form a flat surface for supporting the floor tiles. The cover membrane is configured to be coupled to the base membrane using at least one of a snug fit and a snap fit.

The present invention discloses a high-temperature fluid transporting pipeline integrating a heat exchange apparatus, wherein heat contained in a high-temperature fluid can be recovered during the transportation thereof. The heat exchange apparatus comprises a hermetic heat exchange cavity, and a heat-receiving fluid coil installed therein. The method of heat exchange is that the high-temperature fluid heats an auxiliary fluid in the cavity via a heat exchange base plate of the heat exchange cavity in contact therewith, and the heated auxiliary fluid then conducts the heat to a heat-receiving fluid in the heat-receiving fluid coil. As an example, the high-temperature fluid is flue gas generated by combustion, an upper part of a flue gas transporting pipeline is replaced by the heat exchange apparatus of the present invention, the auxiliary fluid is an inert gas such as air, and the air heated indirectly by the high-temperature flue gas conducts heat to fuel and/or oxygen-enriched gas flowing in the heat-receiving fluid coil (as an oxidant/combustion aid).

A process for removing or reducing the accumulation of foulant within furnaces and heat exchangers in industrial systems such as an oil refinery by introducing a periodic steam blast. The steam blast is directed into the fluid stream from which the foulants form on to the heat exchanger surfaces. The steam blast increases the flow rates, creates turbulence and increases the temperature within the heat exchanger to dislodge foulant in both a soft and hardened states from internal surfaces upon which foulants have adhered and accumulated.

A hot water appliance includes a housing defining an inner space; a heat source arranged in the inner space of the housing and comprising at least one burner; a flue gas discharge arranged in the inner space of the housing and configured to discharge combustion gases of the at least one burner therethrough; and a heat exchanger arranged in the inner space of the housing and associated with the flue gas discharge. The combustion gases of the at least one burner form a first heat exchanging fluid of the heat exchanger associated with the flue gas discharge. A flue gas discharge for a hot water appliance and a method for heating a fluid are also described.

Proposed is a battery fire suppression system with a fire extinguishing agent cooling function, in which a fire extinguishing gas serves as a refrigerant for cooling a fire extinguishing agent and at the same time, the fire extinguishing gas is sprayed into a battery room or a battery module to quickly extinguish a fire in the battery. While allowing the fire extinguishing gas to basically serve as the refrigerant, depending on the amount of combustible materials loaded in the battery room, the shape of battery cells installed inside the battery module, the battery capacity, etc., it is possible to selectively determine whether to allow the fire extinguishing gas to serve only as the refrigerant, or to allow the fire extinguishing gas to be sprayed to the battery module where the fire has occurred to cool the surface of the battery module or directly extinguish the fire in the battery module.

A heat exchanger (10) to provide heat exchange between fluids (24, 25), such as in a solar power plant (1), may include a first and second pipe connectors (13, 14), and a pipe bundle (17) extending between the first and second pipe connectors, with pipes (17a-17n) of the pipe bundle configured to guide a second fluid (25). The pipe bundle may be connected to the first and second pipe connectors at pipe connection points (16) so the inside of the pipes (17a-17n) is in fluid communication with cavities (15) of those connectors. The pipes may be arranged adjacent each other and extending together between the pipe connectors in a meandering manner providing a plurality of crests (20a, 20b) on the pipes between the pipe connectors, so that crests of the pipes are arranged to extend into recesses provided by one or more crests on other pipes of the pipe bundle.

A fluid supply includes a first fluid source configured to supply a first fluid, a second fluid source configured to supply a second fluid, a heat exchanger configured to exchange heat between the first fluid and the second fluid, a first fluid recovery tank configured to recover the first fluid that has passed through the heat exchanger, and a first transfer pipe configured to transfer the first fluid from the first fluid source to the first fluid recovery tank via the heat exchanger. The heat exchanger may be disposed at a vertical level higher than a vertical level of the first fluid recovery tank.

A smart air conditioner for reduction in fine dust and harmful gas includes: an eternal chamber including a first side coupled to communicate with an interior and a second side communicating with an exterior; an internal chamber disposed to pass through an inside of the external chamber and including a first side coupled to communicate with an interior and a second side communicating with an exterior; an external chamber damper installed in the external chamber and controlling air flow; and an internal chamber damper installed in the internal chamber and controlling air flow.

A heat exchanger having a first heat transfer tube with a first primary straight part and a first secondary straight part is provided. The heat exchanger includes a first primary bond part and a first secondary bond part. The first primary bond part is welded to the first secondary bond part to form a first primary bond that bonds the first primary straight part and the first secondary straight part of the first heat transfer tube. The first primary bond limits a first primary aperture and a first secondary aperture formed by the holes of the bond parts, wherein the straight parts of the first heat transfer tube extend through the first primary bond via the apertures.

A heat exchanger includes a shell to which a secondary heat medium is configured to be supplied and a plate fin coil body provided in the shell. The plate fin coil body includes a plurality of plate fins and a coil which passes through the plurality of plate fins and through which a primary heat medium is configured to flow.